JPH04339545A - Manufacture of cast slab with casting plural layers - Google Patents
Manufacture of cast slab with casting plural layersInfo
- Publication number
- JPH04339545A JPH04339545A JP13338391A JP13338391A JPH04339545A JP H04339545 A JPH04339545 A JP H04339545A JP 13338391 A JP13338391 A JP 13338391A JP 13338391 A JP13338391 A JP 13338391A JP H04339545 A JPH04339545 A JP H04339545A
- Authority
- JP
- Japan
- Prior art keywords
- static magnetic
- magnetic field
- layer
- inner layer
- density
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005266 casting Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000010410 layer Substances 0.000 claims abstract description 49
- 230000003068 static effect Effects 0.000 claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 33
- 239000002344 surface layer Substances 0.000 claims abstract description 21
- 150000002739 metals Chemical class 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 239000002436 steel type Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000009749 continuous casting Methods 0.000 description 10
- 238000007654 immersion Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は内層と外層が組成の異な
る複層鋳片を溶融状態から連続的に製造する鋳造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting method for continuously producing multi-layer slabs in which the inner and outer layers have different compositions from a molten state.
【０００２】0002
【従来の技術】連続鋳造によって複合鋼材を製造する方
法として、長さの異なる２本の浸漬ノズルを鋳型内にあ
る溶融金属のプールに挿入し、それぞれのノズルの吐出
口を深さが異なる位置に設け、異種の溶融金属を注入す
るものが特公昭４４―２７３６１ 号公報に開示されて
いる。[Prior Art] As a method for manufacturing composite steel materials by continuous casting, two immersion nozzles of different lengths are inserted into a pool of molten metal in a mold, and the discharge ports of each nozzle are placed at different depths. Japanese Patent Publication No. Sho 44-27361 discloses a device that is installed in a molten metal and injects different types of molten metal.
【０００３】また、特公昭４９―４４８５９ 号公報に
は、鋳型に注入された異種の溶融金属間に耐火物製の隔
壁を設け、異種の金属が相互に混合することを防止しな
がら連続鋳造することが開示されている。[0003] Furthermore, Japanese Patent Publication No. 49-44859 discloses that a partition wall made of refractory is provided between different types of molten metals poured into a mold, and continuous casting is performed while preventing the different types of metals from mixing with each other. This is disclosed.
【０００４】さらに、特公昭６３―１０８９４７号公報
には、図２に示すように鋳型１内に浸漬ノズル（２）、
（３）を介して注入された異種の溶融金属間に静磁界Ｉ
（７）を使用して両金属が混合することを防止しながら
複層鋳片を製造することが開示されている。Furthermore, Japanese Patent Publication No. 63-108947 discloses that a submerged nozzle (2),
(3) Static magnetic field I between dissimilar molten metals injected through
(7) is disclosed to produce a multilayer slab while preventing both metals from mixing.
【０００５】これは、鋳造方向のある長さ域の鋳片全幅
にわたって磁力線が存在するような静磁界Ｉ（７）を形
成させ、この静磁界Ｉ（７）を境界としてその上下に異
種の溶融金属（１０）、（１１）を供給するものである
。その結果、上下層が接する位置での上下層の混合を最
小限に抑える事ができる。[0005] This creates a static magnetic field I (7) in which lines of magnetic force exist over the entire width of the slab in a certain length region in the casting direction, and different types of molten metal are formed above and below this static magnetic field I (7) as a boundary. It supplies metals (10) and (11). As a result, mixing of the upper and lower layers at the position where the upper and lower layers contact can be minimized.
【０００６】[0006]
【発明が解決しようとする課題】従来、連続鋳造におい
ては鋳型内へは単一密度の金属を供給してきた。このた
め、溶鋼の密度の変化が鋳片性状へ及ぼす影響は見られ
なかった。Conventionally, in continuous casting, metal of a single density has been fed into the mold. Therefore, no effect of changes in the density of molten steel on the properties of the slab was observed.
【０００７】一方、２種類の金属を鋳型内に同時に注入
して複層鋳片を製造する技術においては、使用する金属
の組合せによっては静磁界Ｉ（７）の上部に位置する表
層用溶鋼の密度が下部に位置する内層用溶鋼の密度より
も大きい場合も生じる。On the other hand, in the technique of manufacturing multilayer slabs by simultaneously injecting two types of metals into a mold, depending on the combination of metals used, the molten steel for the surface layer located above the static magnetic field I(7) may There are also cases where the density is higher than the density of the molten steel for the inner layer located below.
【０００８】この場合には静磁界Ｉ（７）を使用した場
所を通過して密度の高い表層用溶鋼が密度の低い内層金
属部への流入が生じる。その結果、鋳造される鋳片は表
層金属（１０）と内層金属（１１）とが混合した不完全
な鋳片になる。In this case, the high-density molten steel for the surface layer passes through the location where the static magnetic field I(7) is used and flows into the low-density inner layer metal portion. As a result, the cast slab becomes an incomplete slab in which the surface layer metal (10) and the inner layer metal (11) are mixed.
【０００９】本発明の目的は、上記の複層鋳片の連続鋳
造において密度の異なる金属からなる複層鋳片を連続鋳
造によって製造する場合の鋳造方法に関するものである
。[0009] An object of the present invention is to provide a casting method for producing multi-layer slabs made of metals with different densities by continuous casting in the above-mentioned continuous casting of multi-layer slabs.
【００１０】0010
【課題を解決するための手段】本発明は、鋳型内で静磁
界Ｉによって区分された上下２箇所より注入された２種
類の密度の異なる溶融金属を冷却、凝固させて複層鋳片
を鋳造する方法で、内層より外層の溶鋼の密度が高い鋼
種の組合せにおいて、内層用溶鋼供給ノズルの下方に鋳
造方向と垂直に位置する静磁界ＩＩを使用し、さらに、
この静磁界Ｉと静磁界ＩＩとの間に表層用溶鋼よりも密
度の高い元素を添加する事にある。[Means for Solving the Problems] The present invention casts a multilayer slab by cooling and solidifying two types of molten metals having different densities, which are injected from two places, upper and lower, separated by a static magnetic field I in a mold. In this method, in a combination of steel types in which the density of molten steel in the outer layer is higher than that in the inner layer, a static magnetic field II located perpendicular to the casting direction is used below the molten steel supply nozzle for the inner layer, and further,
The purpose is to add an element having a higher density than the surface layer molten steel between the static magnetic field I and the static magnetic field II.
【００１１】この複層鋳片の連続鋳造方法において、内
層用溶鋼を静磁界Ｉと静磁界ＩＩの間に供給する理由は
、この間に供給する表層用溶鋼よりも密度の高い元素を
内層用溶鋼の吐出流により有効に溶解し、さらにこ領域
内に均一に元素を分散させ、さらにこの領域内に添加し
た元素を静磁界ＩＩの下方にピストンフローで供給する
ためである。In this continuous casting method for multi-layer slabs, the reason why the molten steel for the inner layer is supplied between the static magnetic field I and the static magnetic field II is that the molten steel for the inner layer is supplied with a higher density element than the molten steel for the surface layer supplied during this period. This is because the elements are effectively dissolved by the discharge flow, the elements are uniformly dispersed within this region, and the added elements are further supplied into this region under the static magnetic field II by a piston flow.
【００１２】同時にこの２つの静磁界の間の溶鋼に所定
元素を添加するが、この添加はワイヤー、条線、粉粒状
等の元素で添加する。At the same time, a predetermined element is added to the molten steel between these two static magnetic fields, and this addition is done in the form of a wire, wire, powder, or the like.
【００１３】この元素とは、二種の静磁界の間の溶鋼の
密度が表層用溶鋼の密度よりも高くなる元素を指す、例
えばＣｕ、Ｐｂその他の単体若しくはＦｅの合金あるい
はこれらの複合合金である。[0013] This element refers to an element that causes the density of the molten steel between two types of static magnetic fields to be higher than the density of the molten steel for the surface layer, for example, Cu, Pb, etc. alone, an alloy of Fe, or a composite alloy thereof. be.
【００１４】さらに、この元素の添加量はこの２つの静
磁界により遮蔽された領域の溶鋼の密度が供給する２種
の溶鋼の密度よりも高くなるのに十分な量を添加するこ
とが必要である。Furthermore, it is necessary to add this element in an amount sufficient to make the density of the molten steel in the area shielded by these two static magnetic fields higher than the density of the two types of molten steel supplied. be.
【００１５】ここで、溶鋼の密度よりも高い密度の元素
を供給するのは、２つの静磁界で囲まれた領域の密度を
高くすることにより表層部の溶鋼の内層側への混入を防
止するためである。[0015] Here, the reason for supplying an element with a higher density than that of the molten steel is to increase the density of the area surrounded by the two static magnetic fields, thereby preventing the molten steel in the surface layer from entering the inner layer side. It's for a reason.
【００１６】[0016]
【作用】図１は本発明に従い、表層用金属（１０）の密
度が内層用金属（１１）の密度よりも高い溶鋼の組合せ
の複層鋳片を連続鋳造により製造する場合の静磁界とノ
ズルとの位置関係を示す図である。[Operation] Figure 1 shows the static magnetic field and nozzle when a multi-layer slab is produced by continuous casting according to the present invention, which is a combination of molten steel in which the surface metal (10) has a higher density than the inner layer metal (11). FIG.
【００１７】（１）は鋳型を、（２）、（３）はそれぞ
れの溶融金属を注入する浸漬ノズル、（６）は添加元素
を、（７）、（８）は静磁界を、また（１０）、（１１
）は本方法により製造される複層鋳片の断面を示す。(1) is the mold, (2) and (3) are the immersion nozzles for injecting the respective molten metals, (6) is the additive element, (7) and (8) is the static magnetic field, and ( 10), (11
) shows a cross section of a multilayer slab manufactured by this method.
【００１８】図２は、従来のプロセスにおいて使用され
ている単一の静磁界（７）を使用して鋳造を行う場合に
密度の低い内層金属（５）が密度の高い表層用金属（６
）内に浮上混合するために、鋳片表層部に内層元素が混
入する現象を表わす図である。FIG. 2 shows that when casting is carried out using a single static magnetic field (7) used in conventional processes, the lower density inner layer metal (5) is replaced by the higher density surface layer metal (6).
) is a diagram illustrating a phenomenon in which inner layer elements are mixed into the surface layer of a slab due to floating mixing within the slab.
【００１９】[0019]
【実施例】水平断面が２５０×９８０ｍｍの内部空間を
持つ連鋳鋳型を用いて、表層にアルミキルド鋼、内層に
Ｓｉを１％含む鋼の構造を持つ複層鋳片を、連続鋳造法
により、鋳造速度１ｍ／分で製造した。[Example] Using a continuous casting mold with an internal space of 250 x 980 mm in horizontal cross section, a multilayer slab with a structure of aluminum killed steel in the surface layer and steel containing 1% Si in the inner layer was produced by continuous casting. It was manufactured at a casting speed of 1 m/min.
【００２０】当初、従来法として図２の方法で鋳造を行
った。ところが〔Ｓｉ〕は鉄に比べて密度が小さいため
、この組合せの溶鋼を用いた鋳造では、混合抑制用の静
磁界Ｉを隔てて、上部に密度の大きい〔Ｓｉ〕を含まな
い表層用溶鋼が位置し、下部に密度の小さい〔Ｓｉ〕を
含んだ内層用溶鋼を供給することになる。Initially, casting was carried out using the method shown in FIG. 2 as a conventional method. However, [Si] has a lower density than iron, so in casting using this combination of molten steel, the surface layer molten steel that does not contain [Si], which has a high density, is placed above the static magnetic field I for suppressing mixing. The molten steel for the inner layer containing low-density [Si] is supplied to the lower part.
【００２１】この場合には、静磁界Ｉを通過して密度の
小さい内層用溶鋼が表層用溶鋼への混入が生じる。その
ため、この様な金属の組合せの場合に製造される鋳片は
表層と内層の成分の混合した鋳片になってしまった。In this case, the molten steel for the inner layer having a low density passes through the static magnetic field I and mixes into the molten steel for the surface layer. As a result, slabs manufactured using such a combination of metals are a mixture of surface layer and inner layer components.
【００２２】そこで、図１に示すように、静磁界Ｉの下
部に両磁界の間に磁界の作用しない領域を設け、さらに
その領域に内層用溶鋼供給ノズル吐出口が位置する様に
静磁界ＩＩを設け、さらに、この領域の濃度が０．１％
となるように鋳型内合金添加により〔Ｃｕ〕を供給しつ
つ鋳造を行った。Therefore, as shown in FIG. 1, a region where the magnetic field does not act is provided between the two magnetic fields below the static magnetic field I, and the static magnetic field II is further placed so that the discharge port of the inner layer molten steel supply nozzle is located in that region. Furthermore, the concentration in this region is 0.1%.
Casting was carried out while supplying [Cu] by adding alloy in the mold so that the following was achieved.
【００２３】その結果、製造される鋳片は表層と内層と
の混合の無い複層鋳片になった、また、ここで添加した
〔Ｃｕ〕は内層用溶鋼と混合するが、添加量が少ないた
めに内層の特性にはほとんど影響を与えないレベルであ
った。[0023] As a result, the manufactured slab became a multi-layer slab without mixing of the surface layer and the inner layer. Also, the [Cu] added here was mixed with the molten steel for the inner layer, but the amount added was small. Therefore, it was at a level that had almost no effect on the properties of the inner layer.
【００２４】[0024]
【発明の効果】本発明の複層鋳片の連続鋳造技術によれ
ば、表層の密度が内層の密度よりも大きい金属の組合せ
の複層鋳片を低コストで連続的に製造することが可能に
なる。[Effects of the Invention] According to the continuous casting technology for multi-layer slabs of the present invention, it is possible to continuously produce multi-layer slabs of combinations of metals in which the density of the surface layer is higher than the density of the inner layer at low cost. become.
【図１】本発明により静磁界Ｉの下方に静磁界ＩＩを設
け、さらに２つの磁界で囲まれた領域内に元素を添加し
て複層鋳片を製造する図である。FIG. 1 is a diagram showing how, according to the present invention, a static magnetic field II is provided below a static magnetic field I, and further elements are added within a region surrounded by two magnetic fields to produce a multilayer slab.
【図２】比較として、静磁界ＩＩと元素の添加を行わな
い場合に密度の大きい表層用溶鋼が内層用溶鋼と混合す
る現象を表わす図である。FIG. 2 is a diagram showing, for comparison, a phenomenon in which molten steel for the surface layer with a high density mixes with molten steel for the inner layer when a static magnetic field II and no element are added.
１ 鋳型 ２ 浸漬ノズル ３ 浸漬ノズル ４ 表層用溶鋼 ５ 内層用溶鋼 ６ 添加元素 ７ 静磁界Ｉ ８ 静磁界ＩＩ ９ 複層鋳片 １０ 鋳片表層 １１ 鋳片内層 1 Mold 2 Immersion nozzle 3 Immersion nozzle 4 Molten steel for surface layer 5 Molten steel for inner layer 6 Additive elements 7 Static magnetic field I 8 Static magnetic field II 9 Multi-layer slab 10 Slab surface layer 11 Inner layer of slab
Claims (1)
上下２箇所より注入された２種類の密度の異なる溶融金
属を冷却、凝固せしめる鋳込み複層鋳片の鋳造方法にお
いて、内層より外層の溶鋼の密度が高い鋼種の組合せに
おいて、内層用溶鋼供給ノズルの下方に鋳造方向と垂直
に位置する静磁界ＩＩを設けて、さらに、この静磁界Ｉ
とＩＩの間に表層用溶鋼よりも密度の高い元素を添加す
ることを特徴とする鋳込み複層鋳片の鋳造方法。Claim 1: In a casting method for a cast multi-layer slab, in which two types of molten metals having different densities are cooled and solidified, the molten metals are injected from two places, upper and lower, separated by a static magnetic field I in a mold, the molten steel in the outer layer being lower than the inner layer. In a combination of steel types with a high density, a static magnetic field II located perpendicular to the casting direction is provided below the molten steel supply nozzle for the inner layer, and furthermore, this static magnetic field I
A method for casting a cast multi-layer slab, characterized by adding an element having a higher density than that of surface layer molten steel between and II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13338391A JPH04339545A (en) | 1991-05-10 | 1991-05-10 | Manufacture of cast slab with casting plural layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13338391A JPH04339545A (en) | 1991-05-10 | 1991-05-10 | Manufacture of cast slab with casting plural layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04339545A true JPH04339545A (en) | 1992-11-26 |
Family
ID=15103453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13338391A Withdrawn JPH04339545A (en) | 1991-05-10 | 1991-05-10 | Manufacture of cast slab with casting plural layers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04339545A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235050A (en) * | 1993-02-10 | 1994-08-23 | Nippon Steel Corp | Stainless clad steel high in joining strength |
-
1991
- 1991-05-10 JP JP13338391A patent/JPH04339545A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235050A (en) * | 1993-02-10 | 1994-08-23 | Nippon Steel Corp | Stainless clad steel high in joining strength |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS63108947A (en) | Continuous casting method for complex steel | |
| JPH04339545A (en) | Manufacture of cast slab with casting plural layers | |
| JPH03243245A (en) | Production of combined steel plate with continuous casting | |
| JPH04339546A (en) | Manufacture of cast slab with casting plural layers | |
| JPH04279249A (en) | Manufacture of casting plural layer cast slab | |
| JP2898199B2 (en) | Manufacturing method of continuous cast slab | |
| JPH06344081A (en) | Method for continuously casting double layer cast slab | |
| JPH04309436A (en) | Continuous casting method for double layer cast billet | |
| JPH06335749A (en) | Method for continuously casting double layer cast slab | |
| JPH07100588A (en) | Production of cast double layer slab | |
| JPH06297091A (en) | Method and apparatus for continuous casting of composite metallic material | |
| JPH01271031A (en) | Method for continuously casting double-layer cast slab | |
| JPH07100587A (en) | Production of duplex layer cast slab difficult to separate | |
| JPH0464780B2 (en) | ||
| JPH04351248A (en) | Production of double layer cast slab | |
| JPH0428454A (en) | Production of duplex layer steel plate with continuous casting | |
| JP2627136B2 (en) | Continuous casting method of multilayer slab | |
| JPH0464770B2 (en) | ||
| JPH04351247A (en) | Method for completing casting in double layer cast slab | |
| JPH03238148A (en) | Method for casting multi-ply layer cast slab | |
| JPH0669601B2 (en) | Horizontal continuous casting machine for multi-layer cast | |
| JPH07115127B2 (en) | Continuous casting method for multi-layer slab | |
| JPH06344082A (en) | Production of double layer cast slab by casting | |
| JPH06297095A (en) | Method for continuously casting duplex layer cast slab | |
| JPS63309354A (en) | Continuous casting method for clad steel cast slab |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980806 |